In the article that appeared on page 82 of the July 2012 issue, information was omitted from the Methods and Results sections. In the subsection Statistical Analysis, the paragraph should have read:
The effect of risk factors on complication rate was studied using the Fisher exact test. Data are given as odds ratio with 95% confidence interval. Univariate regression was also used. Variables from the univariate model with a P < 0.20 were included in the multivariate analyses in addition to age and transplantation, which were forced in. Comparison of drop in Hb between children younger than 3 months and older than 1 year was done with an unpaired Student t test. A 2-tailed P < 0.05 was considered statistically significant. Calculations were performed with GraphPad Instat version 03.10 for Windows (GraphPad Software Inc, San Diego, CA) and PASW-18 (SPSS Inc, Chicago, IL).
The subsection following Transplantation should have been Prediction (rather than Regression) and the text for this section should have read:
Univariate logistic regression with “all bleeding” (both major and minor bleeding) as the dependent factor demonstrated P < 0.20 for LMWH (P = 0.11) and focal lesion (P = 0.042) (Table 4). These 2 were included in a multivariate regression model together with age and transplantation, which were forced in. Although LMWH (P = 0.028, OR 5.49, CI 1.21–24.9) made a significant contribution, focal lesion (P = 0.108, OR 2.38, CI 0.83–6.82) was not significant in this model.
Univariate logistic regression with “major bleeding” as the dependent factor resulted in P < 0.20 for focal lesion (P = 0.187), LMWH (P = 0.097), and acute liver failure (P = 0.05). These 3 were included in a multivariate regression model together with age and transplantation, which were forced in, and only acute liver failure (P = 0.038, OR 27.3, CI 1.20–6.23) made a significant contribution.
Univariate logistic regression with “minor bleeding” as the dependent factor resulted in P < 0.20 just for focal lesion (P = 0.098), and no multivariate regression model was made.
The body of Table 4 should be replaced by the following:
1. Westheim BH, Ostensen AB, Aagenæs I, et al. Evaluation of Risk Factors for Bleeding After Liver Biopsy in Children. J Pediatr Gastroenterol Nutr